Advice for florida holiday?

I think you may run into issues at the waterparks for your son. The bulk of the rides do NOT have ramps and are a thousand and one stairs. You pick up your raft at the bottom and carry it up all the steps to the top (even the family raft at Typhoon Lagoon has to be rolled up the stairs.) I know the wave pool and lazy rives are accessible...as would be the family raft at Blizzard Beach (the chair lift goes to the top there and the rafts ride up a converyer belt. Wet N Wild is mostly a carry raft up a thousand stairs too.